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Thread: shredder review

  1. #41
    Moderator Jitterbugdude's Avatar
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    Re: shredder review

    Bob, That formula for torque applies to an electric motor. The torque produced BY the motor. You cannot transfer that formula over to a non electric pulley. Open the link below. It shows % torque as it relates to % speed. You will note that at 100% rpm (1750 rpm in this case) the torque is 100% (3 ft-lbs typical for a 1hp motor). Now using our shredder, the shredder pulley is spinning at 200 rpm, or about 10% of the motor. So, looking at the chart we see the torque at the shredder pulley is about 10% or about .3 hp.

    The transmission analogy only holds water if we are talking about geared systems but in this case we are talking pulley/belted systems.

    http://docs.engineeringtoolbox.com/d...rque_power.png

    I think I'm about ready to go back to talking about tobacco. Anyone else care to join me?

  2. #42
    Member riverstone's Avatar
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    Re: shredder review

    http://ourpastimes.com/calculate-pul...o-6196301.html

    If you can open it, this explains it it very simple terms. I may be playing with words here but reading back on the posts I can see that the wrong assumption being made. You do not increase the torgue of the motor shaft by pulleys but you do increase the torgue on the driven shaft.
    When you are dead, you do not know that you are dead. All the pain is felt by others.
    The same thing happens when you are stupid!

  3. #43
    Administrator deluxestogie's Avatar
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    Re: shredder review

    Quote Originally Posted by Jitterbugdude View Post
    I think I'm about ready to go back to talking about tobacco. Anyone else care to join me?
    Excellent suggestion. There are many websites on various aspects of mechanics that explore these issues in simple or complex ways. Happy hunting.

    Bob

  4. #44
    Member riverstone's Avatar
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    Re: shredder review

    ^+1
    When you are dead, you do not know that you are dead. All the pain is felt by others.
    The same thing happens when you are stupid!

  5. #45
    Senior Member
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    Re: shredder review

    My attitude is as long as it works

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